Dryophilocoris miyamotoi Yasunaga

(Figs. 19–20)

Dryophilocoris miyamotoi Yasunaga 1999: 163 .

Diagnosis. Easily recognized by the widely pruinose pronotum posterior to calli furnished with the densely distributed, suberect setae. General coloration variable, but usually, in populations of Japan, pronotum with a thick longitudinal yellow line in the middle, and apical part of scutellum with yellowish brown coloration, whereas pronotum with a thin longitudinal yellow line, and apical part of scutellum entirely dark brown in the populations from Korea.

Description. Female: Genitalia (Figs. 19–20): K-structure well-developed, sharply pointed at apical part; sclerotized rings well-developed in anterior wall, thick, ear-like shape (see Yasunaga (1999) for detailed descriptions of both sexes).

Distribution. Japan, Korea (Central)*

Material examined. [YC] Holotype: 3, Mt. Arashiyama, Asahikawa, Kamikawa, Hokkaido, Japan, 30.v.1998, leg. T&M. Yasunaga; 273 specimens including paratypes were examined from the following localities of Japan: Hokkaido: same as the holotype; Ishikari coast; 4-ban River & Aoyama, Tobetsu T., Ishikari; Okusawa Reservoir, Otaru, Shiribeshi; Shimo-Futamatazawa, Yoichi Town, Shiribeshi; Ohnuma, Oshima; Honshu. [SNU] 23, 2Ƥ, Gwangreung National Arboretum, Soheul-up, Pochun-si, GG, South Korea, 12.v.1994, leg. K.S.Woo.

Biology. The host plants of the species are Quercus cripsula Blume and Q. dentata Thunb. et Murray. The species is confirmed to feed also on Juglans spp. in laboratory tests.

Remarks. S pecimens from Korea are generally darker than Japanese specimens on the dorsum, and especially on 1st antennal segment.